Pitman.



E. R. BOUCHARD.

PITIVIAN.

APPLICATION FILED 00T. a. I9Ie.

` Patented May 15, 1917.

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ATTO R N EY E. R. BOUCHARD. PITMAN.

APPLICATION FILED 0CT.9, I9I6.

Patented May 15, 1917.

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WITNESSES N 1TFT? FFTQE.

ELMER RICHARD BOUCHARD, 0F KNOWLES, OKLAHOMA, ASSIGNOR OF ONE-HALF TO GUY PARKER, OF KNOWLES, OKLAHOMA.

PITMAN.

Specification of Letters Patent.

Patented May 15, 1917.

Application led October 9, 1916. Serial No. 124,571.

To all whom t may cof/tecra Be it known that I, ELMER R. BOUCHARD, a citizen of the United States, residing at Knowles, in the county of Beaver and State cf Oklahoma, have invented a new and useful Pitman, of which the following is a specification. i

This invention has reference to pitinen, and its object is to provide a pitman, which will automatically compensate for wear.

The invention is particularly applicable in connection with wheat and Kafir corn harvesters.

Diliiculty is experienced in properly lubricating and adjusting' the pitmen where engaging wrist pins and oftentimes the pitmen will run dry and wear, or the harvester must be stopped at frequent intervals for lubrication.y To overcome these difficulties, the present invention provides a composite structure consisting of a suitable casing constituting the body of the pitman with journal blocks for encircling the wrist pins,

.means for oiling and supplying grease to the bearings and constantly active means for maintaining the bearings permanently tight by taking up all wear.

The invention will be best understood from a consideration of' the following detailed description, taken in connection with the accompanying drawings forming part of this specification with the further understanding that while tne drawings show a practical form of the invention, the latter is not confined to strict conformity with the showing of the drawings, but may be changed and modified so long as such changes and modifications come within the scope of the appended claims.

Tn the drawings Figure 1 is a side elevation of a pitman constructedv in accordance with the present invention, the wrist'pins'being shown in cross section.

Fig. 2 is a top plan view of the pitman, shown in Fig. 1.

Fig. 3 is a longitudinal central section with some parts shown in elevation.

Fig. 4 is a section'on the line 4 4 oi Fig. l.

Fig. 5 is a section on the line 5 5 of Fig. 2.

Referring to the drawings, there is shown a casing 1, which may consist of a strip of sheet steel bent or pressed ntoelongated vwhich may be linally of the blocks one toward the other.

` blocks 13 are made ci Ushape, with the free ends of the legs of the U bent toward each other to provide overlapping extremities 2, 3 respectively, united by rivets 4c, or in any other suitable way to thereby provide an elongated closed rectangular frame, which at the ends has widened portions 6 designed to be traversed by wrist pins 7, S on the parts to be connected by the pitman.

The leg portions of the frame have longitudinally extendedside flanges 9 bent one toward the other and at the ends cut away from the top and bottom members oi' the frame to provide elasticv tongues 10 for a purpose to be described. The end portions of the frame have also bent-over flanges 11 directedl toward the central portion of the frame. This provides a frame with side flanges leaving open spaces between them less than the thickness of the frame from top tobottom, it being assumed that thepitman in the installed position is in an approximately horizontal position and expressions of location with respect to the pitman have reference to such installed position. `Lodged in each widened end 6 of the pitman are bearing blocks 12, 13, respectively, grooved out, as shown at 14 to 'spacing being indicated at 15, so that as the grooves 14 forming seats in the blocks for the respective wrist pin wear, such wear may be at once taken up by the approach The blocks are held snugly in place against escape from the frame 1 by the top and bottom members of the frame, the flanges 9 so far as they engage the blocks, the elastic tongues 10 and the end iianges 11 together with other flanges to be described.

The blocks l2 and 13 are of about or somewhat less than the length of the widened end 6 containing them. The mid portion of the frame 1 between the ends 6 contains other-blocksl, 17 bearing against the respective blocks 13 through cushion pieces 18 of leather or other suitable material whereby a slightly yieldable Contact between the respective blocks is provided. This is of advantage since while it is customary to make bearing blgcks of instal the woo Y ward the respective ends of Y tight to avoid rattling;

Vin between the respective The blocks 16 and 17 are also made of wood, thus correspondingly lightening the pitman. Each block 16 and 17 is traversed by an elongated slot 19 extending from the top plate to the bottom plate ot the Jframe 1. Each slot 19 is traversed by the shank of a bolt 20 having a squared portion 21 extending through the bottom plate and terminating in a head 22 bearing against the under face of the bottom plate. r1`he other end of the shank ot the bolt extends through lthe top plate and terminates in a threaded portion 23 to which is applied a nut 24 confining a spring 25 between the top plate of the frame 1 and awaslier 26 traversed by the belt and engaged by thenut.

rlllie tension ot' the spring 25 's readily regulated by the nut 24 and the `latter is held against turi'iing by a cotter pin 27, or any other suitable pin extending through any suitable one ot aV number of holes 28 produced in the threaded'end of the bolt and lodging in any one of a number oiq grooves 29 in that vtace of the nut remote from the washer 26; The cotter pin serves as a convenient means for locking the mit in any suitably adjusted position. 'The' bolts V20 with the springs 25 provide a yieldable holding means for preventing separation ot the long sides ot' the trame 1 without undue binding on the blocks 16 and 17 and at the same time holding the parts tight enough to prevent rattling under conditions of use. The meeting ends of the blocks 16 and 17 are beveled, as shown at 30, the bevel of one block being opposite to that of the other to provide a wedge-shaped passage for a Ypy- Y rainidal wedge head 31 on one end of a bolt shank 32, the other end of which is screwthreaded, as shown at 33, to receive a nutV 34 with grooves 35 in one tace to lodge a cotter pin 36 traversing the threaded end ot the bolt through any one of passages 37. Surrounding the shank of the bolt 32 is a conical spring 38 bearing at the large end upon the top plate of the Vframe 1 and at the small end engaging a washer 39 bearing lnterposed between the or other suitable Ysoft material of more 'orv less cushioningV nature. leather sheets 41 are set in the respective blocks16 and 17 immediatelybeneath-that portion of the top ofV the frame 1 engaged by the spring 38. The purpose of theV wedge head 31v is ,to urge the blocks '16 and 17 tothe pitinan thus constantly urgingthe blocks 1)V towardY the blocks 12 and maintaining` the journal bear- Y ings ofthe respective wrist '.pins sufficiently rlhe action-ofthe ldraw the head 31 blocks 16 and *Y 17 vthese blocksandY Yspring V38 is to constantly in a direction nto separate 43 ot known construction,

Furthermore,

therefore automatically take up all weai which may occur in therbloclrs 12 and 13 where engaging the wrist pin. Those ends of the lblocks 16 and 17 presented toward the block 13 are reduced in height providing seats tor sheets or plates of leather, or other suitable material and the end of each block 16 and 17 has 'fast thereto a plateV 43 which may be ot' sheet metal extending beyond the sides .torni flanges 44 aiding in maintaining the blocks 13 within the Jframe 1. rhe plates 43 are held to the respective blocks 16 and 17 by screws or in any other suitable manner.

Riveted, or otherwise secured to the top plate olE the frame at about the meeting points of the blocks 13 with the respective blocks 16 and 17 are metal plates 46 of su'liicient thickness -to be tapped tor the reception oiE the threaded iiech 4.7 ot a grease cup and so needing uo particular description. Lxtending through the corresponding ends or tliebloclis 13 and the respective blocks 16 and 17 are passages 49 leading from grease :cups 48 to the bearings for the wrist pins 7 and 8, there being Y a` grease cup Vtor cach wrist pin. Also leading to the bearings toi the respective wrist pins and opening through raised portions 50 ot' the top plate et the traine are passages 51 constituting oiling passages for the Vwrist pins. I Y Y "vl/ThenY the machine containing the pitnian Y is in operation, the wrist pins are preliminarilv lubricated through :the passages 51 and the grease cups 46 are iilledin the usual mannerwith-lubricating grease. So long as the initial lubrication is eiiiective, thegrease cupsremaiii inert, but when the initial lubrication ceases the wrist pin bearings begin-to heat, and such heat is ult-mately conducted to the grease cups, thus liquefying the grease, which ir'lows to the vides further lubrication. lt will be understood that the usual pendent grease cups may be iis-edit'- desired andY tliey'ma-y be provided withrthe customary safety springs to vprevent loosening. Suclr temperature action in causing lubrication is sufficiently slow to maintain `Vlubrication without waste'V ot lubricant, wherefore a single lling of Y the grease cups is suiiicient tor a days work,VV

without any danger Vivrist vpins or their attention on machine. e Y f Y Y leretoforeprfrequent lubricationhas been necessary,forrin the absence otsuch lubrication, damage of undue heating of' the bearings, and without the part of the operator. of the lwelllubricated condition, the actionfbeing 13'( of the block and bent over to bearings and prof has occurredthrough wear '125 to the wrist pm hearings and the wrist pins entirely automatic and the parts are always maintained tight, whereby rattling is entirely avoided without any attention, the structure automatically taking up or compensating for all wear.

Furthermore, the pitman is of especially strong construction without liability of damage and at the same time light in weight as compared with a pitman of the same capability of resistance to damage if made in the form of a casting or forging.

It will be understood, of course, that the invention is useful on mowing machines and binders as well as headers, and may, in fact, be used in any machine to which it is adapted.

1. A pitman comprising` an open sided .trame with pairs of journal blocks at the ends adjustable tor wear,intermediate blocks between the pairs of ournal blocks and movable lengthwise of the frame to correspondingly move the journal blocks of each pair together, spring-actuated means between the intermediate blocks and having a constant tendency to spread the blocks apart, and holding means extending through the frame and through the intermediate blocks with the latter movable in the direction of their length on the holding means, whereby the frame is held from spreading at points intermediate of its length.

2. A pitman comprising a frame with journal blocks at opposite ends, intermediate blocks between the rst named journal blocks and having beveled adjacent ends and also being slotted between the ends, bolts traversing the slots and the frame and provided with springs bearing against one face of the frame, a bolt traversing the frame between the beveled ends of the intermediate blocks and provided with a wedge-shaped head engaging the beveled ends of the blocks, and a spring surrounding the last-named bolt and bearing against the face of the frame.

A pitman comprising an open sheet `metal frame with longitudinal side anges having iexible extremities, journal blocks seated in the end portions of the frame and removable therefrom, other blocks in the frame intermediate of the ends of the frame and bearing against the journal blocks, and spring actuated means having a constant tendency to move the intermediate blocks against the journal blocks.

4. A pitman comprising an open sheet metal frame with longitudinal side flanges having flexible extremities, journal blocks seated in the end portions of the frame and removable therefrom, other blocks in the frame intermediate of the ends of the frame and bearing against the journal blocks, and spring actuated means having a constant tendency to move the intermediate blocks against the journal blocks, the end portions of the frame having Hanges extending laterally of the length of the frame to retain corresponding journal blocks, and the intermediate bloclrs having' flanged members engagin g others of the ournal blocks for holding them against lateral movement in the frame.

5. A pitman having journal blocks at opposite ends for engaging corresponding journals and provided with passages for the preliminary application of lubricant between the blocks for the respective journals to reach journals mounted therein, other blocks between the pairs of journal blocks and engaging the latter to hold the journal blocks against journals mounted therein, and lubricant cups adjacent to the journal blocks for the lubrication ot the journals by grease softened by heat frictionally generated in the journal blocks, said second-named blocks and the journal blocks adjacent thereto having matching passages for conducting lubricant from the cups to the respective journals.

In testimony, that I claim the foregoing as my own, I have hereto alixed my signature in the presence of two witnesses.

READER I". Daim', C. F. Fnrnn.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

